Speed-multiplying power-transmitting device.



No. 824,216. PATENTED JUNE- 26, 1906.

J. K. STEWART.

SPEED MULTIPLYING POWER TRANSMITTING DEVICE.

APPLICATION FILED AUG. 3.190s.

ITED STATES PATENT orries.

' JOHN STEWART, 'OF CHICAGO, ILLINOIS.

SPEED-MULT IPLYlNG POWER-TRANSMITTING DEVICE.

Specification of Letters Patent.

. natentiuulm 2e, 1 906.

Application filed Augusl 3,1905. Serial Nol272A7l.

To all whom it may concern Be it known that I, JOHN K. STEWART, a citizen of the United States, residing at Chicago, in the county of Cook and State of nois, have invented new and useful Im rovements in Speed-Multiplying 'Poweransmitting Devices, of which the following is a specification, reference being had to the acoom anying drawings,forming apart thereof.

Tffe purpose of this invention is to provide an improved com act s eed train of gear and a case complete y inc osing all the wheels thereof adapted to be mounted on a standard or bracket in any convenient manner so as to be temporarily fixed, only the shafts to. and from which power is transmitted projecting therefrom. F

It consists of the features ofconstruction,

set out in the claim.

In the drawings, Figure 1 is a perspective view of the entire device, showing a crankhandle on the power-receiving shaft and a flexible shaft-coupling on the power-transmitting shaft. ,Fig. 2 is a section axial with respect to all the shafts through the entire train and case. Fig. 3 is a section at the line 3 3 on Fig. 2, with the fly-wheel partly broken away.

For the purpose of this invention I make a ear-case comprising two members 1 and 2,

aving their arting plane transverse to the shafts and a apted to be secured rigidly together by bolts 3 3 3 and 4. The member 1 has the longhub 5, which affords bearing for the ower-receiving or driving shaft 6, said sha being rigid and preferably integral with the ear 7 as a spindle thereof, said gear being the case. Rigidly rooted in the web of the member 1 is a stud-axle 8, on which there is journaled a double wheel comprising'the ear 9 and a pinion 10, thelatter meshin wit the gear 7 and the former meshing wit a pinion 11 on a reduced portion 12 of the'power-transmitting shaft 12, that shaft being journaled in a long hub 13 of the member 2 of the case and having rigid with it within the case a fly-wheel 14 on the unreduced portion of the shaft. The gear 7 has at thecenter on the face toward the pinion 10 at the center a socket for a bearing 15 for the reduced which/it will e understood, is coaxial with ortion 12 of the shaft 12,

the shaft 6, and the mutual engagement of the two shafts with each other, in addition to them in alinement witheach of them, thus obtaining substantially the advantage ofthe long bearing of the other for that purpose. The specific use for which this device is "specially intended being to drive flexibleshafting, thereis shown on the shaft 12 a familiar of the sleeve which extends into the bearing bersof ahinge-couplin the other of which flexible shaft, (not shown,) the said coupling 12 and 1n the hub 13 by the "gear element 17-, screwed fast onto the end of the shaft 12 outside within the cup or cavity of the flange 16.

scribed, especially'asthe present invention couplings, though especially adapted for the sha ts are much used.

vstandard or bracket the member 1 has a hollow interiorl -threaded boss 18, rojecting from one si e edge midway in'tfie length. A thfeaded stem of a portable standard or wall-bracket (not shown) may thus receive the entire device, and a crank-handle 19 bein applied to the shaft 6 to drive the train a apts it to be employed with especial convemence commumcating power vto an tool which may be driven by a flexible sha t connected to the outleading shaft 12, which many times over that of the crank. In the train, as illustrated, the speed of the alternating shaft is sixteen times that of the crank.

I claim A speed-multiplying device comprising a two -part housing and a gear train completely inclosed therein, the initial and final shafts of the train being coaxial andprotruding from opposite sides of the housing, the

the long bearings 5 and 13, with which both form of flexible shaft-coupling. 16, consisting 13 and at the outer end of ,the bearin "has the flange 16, which constitutes one of t e mem- (not shown) 1s identica inform-and con a-- tutes the bearing of the next member of the 16 being longitudinally stopped on the shaft These features pertaining to flexible shaftcouplings being of familiar form, their con. stru'ction and use need not be further de is not limited to use with such flexible shafthas by means ofthe train a speed multiplied.

shafts are provided, assists in preserving 1 I pur oses in connection with which .flexible s For thepurpose of mounting the case on a i i I seams ahting lgflane of the two members of the my hand, at Chicage, Illinois, this 1st day of ousing eing' transverse to all the shafts, one- August, 1905. of said members having a threaded boss projecting from the edie of the housing m a JGHN K; STEWART 5 plane transverse to t e shafts, for mountin In presence of the housing on a threaded stem or standar LEANDER H. LA CHANCE,

In testimony whereof I have hereunto set M. GERTRUJDE ADY. 

